Shutter-fastener



(No Model.)

` R. MQNAB. `SHUTTER FASTENBR. No. 526,729. r Patented Oct. 2, 1894.

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UNITED STATES PATENT OEEICE.

ROBERT MCNAB, OF PATERSON, NEW JERSEY.

SHUTTER-FASTEN ER.

SPECIFICATION forming part of Letters Patent No. 526,729, dated October2, 1894. Application led March 6, 1894. Serial No. 502,575. (No model.)

To a/ZZ whoml it may oon/cern.'

Beit known that l, ROBERT MCNAB, a `,citizen of the United States,residing at Paterson, in the county of Passaic and State of New Jersey,have invented a new and useful Shutter-Fastener, of which the followingis a specification.

This invention relates to shutter fasteners; and it has for its objectto provide a simple, efficient and automatic shutter fastener whichshall provide means for securely locking a shutter or blind in itsclosed position and absolutely preventing the shutterfrom being openedfrom the outside or opened at all until the lower sash of the window israised.

To this end the main and primary object of the present invention is toprovide a practical and efficiently workinglock of this character,which, while securing the results specified',at the same time can beeasily and quickly positioned without defacing or marring the parts towhich the different parts of the lock are attached.

With these and other objects in View which will readily appear as thenature of the invention is better understood, the same consists in thenovel construction, combination and arrangement of parts hereinaftermore fully described, illustrated and claimed.

In the accompanying drawingszp-Figure l is an enlarged detail sectionalview of the lower portion of a window frame including the lower sash anda shutter, showing my improved lock as holding the shutter closed. Fig.2 is a det-ail in perspective of the automatic catch, separated from theshutter. Fig. 3 is a similar view of the hook or sill plate engaged bythe automatic catch. Fig. 4 is a similar view of the sash plate.

Referring to the accompanyingdrawings, A represents a substantiallyU-shaped lock casing projected from one side of the attachment flange orplate B, which is provided with the screw holes t, to receive thefastening screws that pass therethrough to secure the casing to theinside of a swinging shutter X, at the usual place where the ordinaryfastening devices are located, and said shutter is t hinged to thewindow frame Y, in which slides the ordinary lower sash Z, the lowerrail of which is shown in the drawings to illustrate the attachment ofthe herein described lock.

The substantially U-shaped lock casing A, is provided in the oppositesides thereof with the pin openings C, which receive the transversepivot pin D, to pivotally support within `the casing the automatic catchplate E. The

automatic catch plate E, freely works within the casing A, and isprovided upon its top side near its inner end with the perforated pivotlug F, which registers in the space between the opposite sides of thecasing and receives the pin D, to support the plate in position, andbeyond the pivot lug F, the inner end of the catch plate is extended toform a stop iiange G, which works in the stop opening H, formed in theattachment flange or plate B, at the inner end of the casing A, andagainst the upper side of which opening the flange G, is adapted to bearto limit the downward play of the outer end of the catch plate, which isnormally held depressed in a substantially horizontal position by meansof the spring I. The spring I, is arranged within the casing A, and hasthe upper end thereof held in position within the spring socket J,projected integrally from the top side of the casing A, and the lowerend of said spring engages over the plate pin K, projected upwardly fromthe plate E, in front of the lug F.

Beyond the outer end of the casing A, the

plate E, is widened into a locking end and is -edge of the plate E, isbeveled as at M, to

freely ride over the inclined hook flange N. rlhe hook flange N, arisesfrom the sill plate O, which is adapted to be attached to the sill ofthe window frame Y, outside of the sash Z, and said hook iiange isprovided with an outer inclined top edge o, over which the outer end ofthe plate E, rides, and with an inner shouldered end P, with which thecatch plate is` forced into engagement after rising up over the inclinedtop edge.

When the shutter is open, the automatic catch plate is normally helddepressed by the spring I, as stated, but when the shutter is swungclosed the beveled outer edge of the said catch plate will automaticallyengage with the inclined hook flange N, and the said catch plate is heldsecurely locked in engagement with the hook flange by means of thebifurcated lock iiange Q, projected horizontally from one side of thesash plate R, that is adapted to be attached to the outer side of thelower sash rail, and to be lowered by the lowering of the sash onto thesaid catch plate. The bifurcated lock flange Q, is strengthened in itsprojection from the sash plate by the strengthening ribs or projectionsS, connecting the top sides of the flange with such plate. After theengagement of the catch plate with the hook flange, the lowering of thesash brings the bifurcation over the upper projecting end of the hookflange and disposes the Opposite portions of the lock flange directlyover opposite sides of the catch plate an-d thereby effectually preventsthe same from` being lifted out of engagement with the hook fiange untilthe sash is raised.

mino'r details of construction may be resorted t0 without departing fromthe principle or t sacrificing any of the advantages of this iuvention.

in said casing and adapted to automatically ride into engagement withsaid stationary4 hook, and a sash plate adapted to engage over saidcatch plate when engaged with said hook, substantially as set forth.

2. In a shutter fastener, the sill. plate having an inclined hookflange, a. lock casing adapted to be attached to a shutter, a nor-4mally depressed catch plate pivoted within said lock casing and providedwith an elongated catch Opening adaptedA to automatically engage oversaid hook flange, and a sash plate provided with a bifurcated lockflange adapted to embrace said hook flange above the catch plate whenthe latter is in engagement therewith, substantially as set forth.

3. In a shutter fastener, the sill plate having an inclined hook flangeprovided with an inner shouldered edge, a lock casing adapted to beattached to ashutter, a spring depressed catch-plate pivotally mountedwithin the lock casing and provided with an elongated catch opening anda beveled outer edge, and a sash plat-e having a locking flange adaptedto work over said hook flange, substantially as set c forth. Changes inthe form, proportion and the 4. In. a shutter fastener, the combinationwith a sill hook; of a lock casing provided with asprin g socketprojected from its top side and with an attachment plate or flange atits inner i end having a stop opening therein,a catch Having thusdescribed the invention, what is claimed, and desi redv to be secured byLett plate pivotally supported within said casing and having a stopflange at its inner end adapted to` work in said stop opening and an l.In a shutter. fastener, the combin-ation of a stationary hook, a lockcasing, a normally depressed catch plate pivotally mounted Withy outerlocking end provided with a catch opening, and a spr-ing arranged withinthe said spring socket at one end and bearing at its other end on thetop side of said catch plate, substantially as set forth.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

ROBERT MCNAB.

Witnesses: r

THos'. A. MCNAB,` GEORGE W. ScULL.

